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Date: Tue, 14 Jun 2016 09:49:33 -0600
From: Logan Gunthorpe <logang@...tatee.com>
To: Allen Hubbe <Allen.Hubbe@....com>, 'Jon Mason' <jdmason@...zu.us>,
'Dave Jiang' <dave.jiang@...el.com>
Cc: 'Shuah Khan' <shuahkh@....samsung.com>,
'Sudip Mukherjee' <sudipm.mukherjee@...il.com>,
'Arnd Bergmann' <arnd@...db.de>, linux-kernel@...r.kernel.org,
linux-ntb@...glegroups.com, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 8/8] ntb_test: Add a selftest script for the NTB subsystem
On 14/06/16 09:47 AM, Allen Hubbe wrote:
> From: Logan Gunthorpe
>> This script automates testing doorbells, scratchpads and memory windows
>> for an NTB device. It can be run locally, with the NTB looped
>> back to the same host or use SSH to remotely control the second host.
>>
>> In the single host case, the script just needs to be passed two
>> arguments: a PCI ID for each side of the link. In the two host case
>> the -r option must be used to specify the remote hostname (which must
>> be SSH accessible and should probably have ssh-keys exchanged).
>>
>> A sample run looks like this:
>>
>> $ sudo ./ntb_test.sh 0000:03:00.1 0000:83:00.1 -p 29
>> Starting ntb_tool tests...
>> Running db tests on: 0000:03:00.1 / 0000:83:00.1
>> Passed
>> Running db tests on: 0000:83:00.1 / 0000:03:00.1
>> Passed
>> Running spad tests on: 0000:03:00.1 / 0000:83:00.1
>> Passed
>> Running spad tests on: 0000:83:00.1 / 0000:03:00.1
>> Passed
>> Running mw0 tests on: 0000:03:00.1 / 0000:83:00.1
>> Passed
>> Running mw0 tests on: 0000:83:00.1 / 0000:03:00.1
>> Passed
>> Running mw1 tests on: 0000:03:00.1 / 0000:83:00.1
>> Passed
>> Running mw1 tests on: 0000:83:00.1 / 0000:03:00.1
>> Passed
>>
>> Starting ntb_pingpong tests...
>> Running ping pong tests on: 0000:03:00.1 / 0000:83:00.1
>> Passed
>>
>> Starting ntb_perf tests...
>> Running local perf test without DMA
>> 0: copied 536870912 bytes in 238205 usecs, 2253 MBytes/s
>> Passed
>> Running remote perf test without DMA
>> 0: copied 536870912 bytes in 238205 usecs, 2253 MBytes/s
>> Passed
>>
>> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
>> ---
>> MAINTAINERS | 1 +
>> tools/testing/selftests/ntb/ntb_test.sh | 386 ++++++++++++++++++++++++++++++++
>> 2 files changed, 387 insertions(+)
>> create mode 100755 tools/testing/selftests/ntb/ntb_test.sh
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 9c567a4..f178e7e 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -7846,6 +7846,7 @@ F: drivers/ntb/
>> F: drivers/net/ntb_netdev.c
>> F: include/linux/ntb.h
>> F: include/linux/ntb_transport.h
>> +F: tools/testing/selftests/ntb/
>>
>> NTB INTEL DRIVER
>> M: Jon Mason <jdmason@...zu.us>
>> diff --git a/tools/testing/selftests/ntb/ntb_test.sh
>> b/tools/testing/selftests/ntb/ntb_test.sh
>> new file mode 100755
>> index 0000000..e4a89e9
>> --- /dev/null
>> +++ b/tools/testing/selftests/ntb/ntb_test.sh
>> @@ -0,0 +1,386 @@
>> +#!/bin/bash
>> +# Copyright (c) 2016 Microsemi. All Rights Reserved.
>> +#
>> +# This program is free software; you can redistribute it and/or
>> +# modify it under the terms of the GNU General Public License as
>> +# published by the Free Software Foundation; either version 2 of
>> +# the License, or (at your option) any later version.
>> +#
>> +# This program is distributed in the hope that it would be useful,
>> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
>> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> +# GNU General Public License for more details.
>> +#
>> +# Author: Logan Gunthorpe <logang@...tatee.com>
>> +
>> +REMOTE_HOST=
>> +LIST_DEVS=FALSE
>> +
>> +DEBUGFS=${DEBUGFS-/sys/kernel/debug}
>> +
>> +PERF_RUN_ORDER=32
>> +MAX_MW_SIZE=0
>> +RUN_DMA_TESTS=
>> +DONT_CLEANUP=
>> +
>> +function show_help()
>> +{
>> + echo "Usage: $0 [OPTIONS] LOCAL_DEV REMOTE_DEV"
>> + echo "Run tests on a pair of NTB endpoints."
>> + echo
>> + echo "If the NTB device loops back to the same host then,"
>> + echo "just specifying the two PCI ids on the command line is"
>> + echo "sufficient. Otherwise, if the NTB link spans two hosts"
>> + echo "use the -r option to specify the hostname for the remote"
>> + echo "device. SSH will then be used to test the remote side."
>> + echo "An SSH key between the root users of the host would then"
>> + echo "be highly recommended."
>> + echo
>> + echo "Options:"
>> + echo " -C don't cleanup ntb modules on exit"
>> + echo " -d run dma tests"
>> + echo " -h show this help message"
>> + echo " -l list available local and remote PCI ids"
>> + echo " -r REMOTE_HOST specify the remote's hostname to connect"
>> + echo " to for the test (using ssh)"
>> + echo " -p NUM ntb_perf run order (default: $PERF_RUN_ORDER)"
>> + echo " -w max_mw_size maxmium memory window size"
>> + echo
>> +}
>> +
>> +function parse_args()
>> +{
>> + OPTIND=0
>> + while getopts "Cdhlr:p:w:" opt; do
>> + case "$opt" in
>> + C) DONT_CLEANUP=1 ;;
>> + d) RUN_DMA_TESTS=1 ;;
>> + h) show_help; exit 0 ;;
>> + l) LIST_DEVS=TRUE ;;
>> + r) REMOTE_HOST=${OPTARG} ;;
>> + p) PERF_RUN_ORDER=${OPTARG} ;;
>> + w) MAX_MW_SIZE=${OPTARG} ;;
>> + \?)
>> + echo "Invalid option: -$OPTARG" >&2
>> + exit 1
>> + ;;
>> + esac
>> + done
>> +}
>> +
>> +parse_args "$@"
>> +shift $((OPTIND-1))
>> +LOCAL_DEV=$1
>> +shift
>> +parse_args "$@"
>> +shift $((OPTIND-1))
>> +REMOTE_DEV=$1
>> +shift
>> +parse_args "$@"
>> +
>> +set -e
>> +
>> +function _modprobe()
>> +{
>> + modprobe "$@"
>> +}
>> +
>> +function split_remote()
>> +{
>> + VPATH=$1
>> + REMOTE=
>> +
>> + if [[ "$VPATH" == *":/"* ]]; then
>> + REMOTE=${VPATH%%:*}
>> + VPATH=${VPATH#*:}
>> + fi
>> +}
>> +
>> +function read_file()
>> +{
>> + split_remote $1
>> + if [[ "$REMOTE" != "" ]]; then
>> + ssh "$REMOTE" cat "$VPATH"
>> + else
>> + cat "$VPATH"
>> + fi
>> +}
>> +
>> +function write_file()
>> +{
>> + split_remote $2
>> + VALUE=$1
>> +
>> + if [[ "$REMOTE" != "" ]]; then
>> + ssh "$REMOTE" "echo \"$VALUE\" > \"$VPATH\""
>> + else
>> + echo "$VALUE" > "$VPATH"
>> + fi
>> +}
>> +
>> +function doorbell_test()
>> +{
>> + LOC=$1
>> + REM=$2
>> + EXP=0
>> +
>> + echo "Running db tests on: $(basename $LOC) / $(basename $REM)"
>> +
>> + write_file "c 0xFFFFFFFF" "$REM/db"
>> +
>> + for ((i=1; i <= 8; i++)); do
>> + let DB=$(read_file "$REM/db") || true
>> + if [[ "$DB" != "$EXP" ]]; then
>> + echo "Doorbell doesn't match expected value $EXP " \
>> + "in $REM/db" >&2
>> + exit -1
>> + fi
>> +
>> + let "MASK=1 << ($i-1)" || true
>> + let "EXP=$EXP | $MASK" || true
>> + write_file "s $MASK" "$LOC/peer_db"
>> + done
>> +
>> + echo " Passed"
>> +}
>> +
>> +function read_spad()
>> +{
>> + VPATH=$1
>> + IDX=$2
>> +
>> + ROW=($(read_file "$VPATH" | grep -e "^$IDX"))
>> + let VAL=${ROW[1]} || true
>> + echo $VAL
>> +}
>> +
>> +function scratchpad_test()
>> +{
>> + LOC=$1
>> + REM=$2
>> + CNT=$(read_file "$LOC/spad" | wc -l)
>> +
>> + echo "Running spad tests on: $(basename $LOC) / $(basename $REM)"
>> +
>> + for ((i = 0; i < $CNT; i++)); do
>> + VAL=$RANDOM
>> + write_file "$i $VAL" "$LOC/peer_spad"
>> + RVAL=$(read_spad "$REM/spad" $i)
>> +
>> + if [[ "$VAL" != "$RVAL" ]]; then
>> + echo "Scratchpad doesn't match expected value $VAL " \
>> + "in $REM/spad, got $RVAL" >&2
>> + exit -1
>> + fi
>> +
>> + done
>> +
>> + echo " Passed"
>> +}
>> +
>> +function write_mw()
>> +{
>> + split_remote $2
>> +
>> + if [[ "$REMOTE" != "" ]]; then
>> + ssh "$REMOTE" \
>> + dd if=/dev/urandom "of=$VPATH" 2> /dev/null || true
>> + else
>> + dd if=/dev/urandom "of=$VPATH" 2> /dev/null || true
>> + fi
>> +}
>> +
>> +function mw_test()
>> +{
>> + IDX=$1
>> + LOC=$2
>> + REM=$3
>> +
>> + echo "Running $IDX tests on: $(basename $LOC) / $(basename $REM)"
>> +
>> + write_mw "$LOC/$IDX"
>> +
>> + split_remote "$LOC/$IDX"
>> + if [[ "$REMOTE" == "" ]]; then
>> + A=$VPATH
>> + else
>> + A=/tmp/ntb_test.$$.A
>> + ssh "$REMOTE" cat "$VPATH" > "$A"
>> + fi
>> +
>> + split_remote "$REM/peer_$IDX"
>> + if [[ "$REMOTE" == "" ]]; then
>> + B=$VPATH
>> + else
>> + B=/tmp/ntb_test.$$.B
>> + ssh "$REMOTE" cat "$VPATH" > "$B"
>> + fi
>> +
>> + cmp "$A" "$B"
>> + if [[ $? != 0 ]]; then
>> + echo "Memory window $MW did not match!" >&2
>> + fi
>> +
>> + if [[ "$A" == "/tmp/*" ]]; then
>> + rm "$A"
>> + fi
>> +
>> + if [[ "$B" == "/tmp/*" ]]; then
>> + rm "$B"
>> + fi
>> +
>> + echo " Passed"
>> +}
>> +
>> +function pingpong_test()
>> +{
>> + LOC=$1
>> + REM=$2
>> +
>> + echo "Running ping pong tests on: $(basename $LOC) / $(basename $REM)"
>> +
>> + LOC_START=$(read_file $LOC/count)
>> + REM_START=$(read_file $REM/count)
>> +
>> + sleep 7
>> +
>> + LOC_END=$(read_file $LOC/count)
>> + REM_END=$(read_file $REM/count)
>> +
>> + if [[ $LOC_START == $LOC_END ]] || [[ $REM_START == $REM_END ]]; then
>> + echo "Ping pong counter not incrementing!" >&2
>> + exit 1
>> + fi
>> +
>> + echo " Passed"
>> +}
>> +
>> +function perf_test()
>> +{
>> + USE_DMA=$1
>> +
>> + if [[ $USE_DMA == "1" ]]; then
>> + WITH="with"
>> + else
>> + WITH="without"
>> + fi
>> +
>> + _modprobe ntb_perf run_order=$PERF_RUN_ORDER \
>> + max_mw_size=$MAX_MW_SIZE use_dma=$USE_DMA
>> +
>> + echo "Running local perf test $WITH DMA"
>> + write_file "" $LOCAL_PERF/run
>> + echo -n " "
>> + read_file $LOCAL_PERF/run
>> + echo " Passed"
>> +
>> + echo "Running remote perf test $WITH DMA"
>> + write_file "" $REMOTE_PERF/run
>> + echo -n " "
>> + read_file $LOCAL_PERF/run
>> + echo " Passed"
>> +
>> + _modprobe -r ntb_perf
>> +}
>> +
>> +function ntb_tool_tests()
>> +{
>> + LOCAL_TOOL=$DEBUGFS/ntb_tool/$LOCAL_DEV
>> + REMOTE_TOOL=$REMOTE_HOST:$DEBUGFS/ntb_tool/$REMOTE_DEV
>> +
>> + echo "Starting ntb_tool tests..."
>> +
>> + _modprobe ntb_tool
>> +
>> + echo > $LOCAL_TOOL/link
>> +
>> + doorbell_test $LOCAL_TOOL $REMOTE_TOOL
>> + doorbell_test $REMOTE_TOOL $LOCAL_TOOL
>> + scratchpad_test $LOCAL_TOOL $REMOTE_TOOL
>> + scratchpad_test $REMOTE_TOOL $LOCAL_TOOL
>> +
>> + for MW in $(ls $LOCAL_TOOL/mw*); do
>> + MW=$(basename $MW)
>> + mw_test $MW $LOCAL_TOOL $REMOTE_TOOL
>> + mw_test $MW $REMOTE_TOOL $LOCAL_TOOL
>> + done
>> +
>> + _modprobe -r ntb_tool
>> +}
>> +
>> +function ntb_pingpong_tests()
>> +{
>> + LOCAL_PP=$DEBUGFS/ntb_pingpong/$LOCAL_DEV
>> + REMOTE_PP=$REMOTE_HOST:$DEBUGFS/ntb_pingpong/$REMOTE_DEV
>> +
>> + echo "Starting ntb_pingpong tests..."
>> +
>> + _modprobe ntb_pingpong
>> +
>> + pingpong_test $LOCAL_PP $REMOTE_PP
>> +
>> + _modprobe -r ntb_pingpong
>> +}
>> +
>> +function ntb_perf_tests()
>> +{
>> + LOCAL_PERF=$DEBUGFS/ntb_perf/$LOCAL_DEV
>> + REMOTE_PERF=$REMOTE_HOST:$DEBUGFS/ntb_perf/$REMOTE_DEV
>> +
>> + echo "Starting ntb_perf tests..."
>> +
>> + perf_test 0
>> +
>> + if [[ $RUN_DMA_TESTS ]]; then
>> + perf_test 1
>> + fi
>> +}
>> +
>> +function cleanup()
>> +{
>> + set +e
>> + _modprobe -r ntb_tool 2> /dev/null
>> + _modprobe -r ntb_perf 2> /dev/null
>> + _modprobe -r ntb_pingpong 2> /dev/null
>> + _modprobe -r ntb_transport 2> /dev/null
>> + set -e
>> +}
>> +
>> +cleanup
>> +
>> +if ! [[ $$DONT_CLEANUP ]]; then
>> + trap cleanup EXIT
>> +fi
>> +
>> +if [ "$(id -u)" != "0" ]; then
>> + echo "This script must be run as root" 1>&2
>> + exit 1
>> +fi
>> +
>> +if [[ "$LIST_DEVS" == TRUE ]]; then
>> + _modprobe ntb_tool
>> + echo "Local Devices:"
>> + ls -1 /sys/kernel/debug/ntb_tool
>> + echo
>
> Without loading ntb_tool, would it be sufficient for your tests to do this:
>
> ls -1 /sys/bus/ntb/devices
Oh, thanks! I didn't even consider that. I'll make that change.
Logan
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